The Continued Demise of the Left-Handed Reliever

Back in 2020, MLB implemented a number of rule changes, both planned and forced by the pandemic-shortened season. Among them, none had the potential for dramatic change but with little actual effect on the game as the three-batter minimum rule. It was an inelegant solution to an infrequent problem: Subsequent investigation after its implementation has shown that the rule hasn’t addressed the pace-of-play issues at the heart of its intended effects.
Where the rule has had an outsized effect is in roster construction. Upon implementation, the value of a certain type of reliever — the Lefty One Out Guy (LOOGY) — was extinguished. Not that there were many LOOGYs left anyway, and the impact they had on games was fairly negligible in the grand scheme of things. This side effect of the rule was foreseen but still unfortunate nonetheless.
While the left-handed specialist has all but disappeared from major league rosters, left-handed relievers in general have felt the effects of this rule change as well. In 2022, southpaw relievers pitched around a quarter of all relief innings, which is right in line with the previous decade of usage. Unsurprisingly, more and more of those outings have come against right-handed batters. In 2013, nearly half of the batters left-handed relievers faced were left-handed as well. Last year, that rate fell to just over a third. Read the rest of this entry »







